Does anyone know the rear wheel horsepower of a stock BonnevilleAmerica?
I am going for a dyno soon and would like to know, since my bike was received in a slightly modified condition TOR shorts with 125 mains, AI in, stock airbox and filter. Of course I've modified some more. After removing the AI with TOR shorts, I bought some stock Speedmaster pipes on ebay for 99 cents (cool, i love long pipes on the BAM & SM. I drilled out the rear plate with a 3/4" rotary file, broke out the tube and ground out the second plate with the same 3/4" rotary file. Then drilled a small pilot hole followed by the 3/4" rotary file in ALL the remaining plates, just beside all the remaining 1/2" tubes (i think there are 4 plates & 2 remaining tubes. I tried 132 jets. The bike pulled hard but sputtered early in the upper power band. I put in some 138 main jets and found a working point, and all was well except for the flat spot in the middle of the power band, and some backfiring on deceleration.
I remembered seeing some of you removing the snorkle, so I yanked it. WOW! I can't believe the difference. I didn't think that restriction would even be significant. She pulled like a 1200 sportster and when power shifting into second, the front wheel bounced off the ground with an 18T counter sprocket. Now I think I need to shim the carb or use TBird Sport needles, since I am sputtering at first roll on of throttle.
Current Settings:
Stock Pilot
138 Main Jets
Fuel Mix = 2.5 turns out
AI removed
Modified airbox with UNI filter
Snorkle out
Totally defiled stock Speedmaster long pipes
(i plan on SpecialtySpares long cannons or Raask pipes in the future).
Any suggestions are welcome, and I will not be offended if you laugh at me.
Blessings!!!
